Update at 11:05 a.m. Saturday: David Herron and Daniel Brooks have both been booked into the Dallas County Jail. Herron's bail has been set at $1,020,750. Brooks' bail is $1,028,250.

Update at 9:36 p.m.: Dallas police say they've arrested two men suspected of murdering 79-year-old Avanell Cowgill in her East Dallas home on March 7: 29-year-old David Herron and 28-year-old Daniel Brooks.

According to Dallas police, the two men entered the woman's home at 1357 Earlywood Drive, near Jupiter Road and E. Northwest Highway in the Lochwood neighborhood. They killed her, then used her credit cards "to purchase an electronic device at a local Walmart," according to a release sent moments before a scheduled 9:30 p.m. press conference. That purchase, as well as an ATM withdrawal, was captured on surveillance video and made public last week.

According to Dallas police, detectives "developed information which led them to a location where the suspects had sold the electronic device." That's when they learned of Daniel Brooks.

"Further investigation determined that Suspect Brooks and Suspect Herron were in a Richardson jail after being arrested on March 20, 2013, for an unrelated Theft of Person charge," says the Dallas PD release. "This arrest stems from a joint effort by the Deployment Officers from the Dallas Police Department’s North Central Patrol Division and the Richardson Police Department. Both suspects have been interviewed by Dallas Homicide detectives and are currently being transported to Lew Sterrett Justice Center where they will be charged with Capital Murder. The bond has been set at $1 million dollars each."

Original item posted at 9:14 p.m.:Moments ago Dallas police sent word of a 9:30 p.m. press conference, the purpose of which is to "announce the arrests made in the Cowgill murder that took place on March 7, 2013, on Earlywood Drive."

In subsequent days Dallas police would release surveillance videos and photos of two men seen using her credit cards and ATM cards. And a reward for information leading to the arrest and indictment of the suspects was increased to $15,000.

Our Tanya Eiserer will be at the press conference; more to come shortly.